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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Breather back into oil tank
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<blockquote data-quote="davidd" data-source="post: 108343" data-attributes="member: 1177"><p>I would have liked to shown Phil Irving the breather on my racer. I have never had a catch can on the bike and it has been ten years. There isn't even oil mist around the outlet, which is hidden under the tank cover. I don't know why it has worked this well, but considering it has worked on several engines I might guess that it has something to do with getting the rings bedded in and running the engine with little or no blow by. I would do a leak down test every racing weekend.</p><p>[ATTACH=full]27581[/ATTACH]</p><p>Right above the carb is the Ducati reed valve breather with a wash cloth zip tied around it so it didn't bang around. I also zip tied it to the carb. I never replaced the cloth and there was never any oil on the carb or the exhaust. The tube runs from the generator hole.</p><p></p><p>I do think that blow by is a bigger problem at low speeds than high speeds. It could be that the peak power being at 6900 rpms makes a difference. I could not go below 4200 rpm due to EGR. It would idle, but there was no power. Slipped the clutch to 6000 to get off the line and was often first in the corner (unlikely to be first out of the corner!)</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 108343, member: 1177"] I would have liked to shown Phil Irving the breather on my racer. I have never had a catch can on the bike and it has been ten years. There isn't even oil mist around the outlet, which is hidden under the tank cover. I don't know why it has worked this well, but considering it has worked on several engines I might guess that it has something to do with getting the rings bedded in and running the engine with little or no blow by. I would do a leak down test every racing weekend. [ATTACH type="full"]27581[/ATTACH] Right above the carb is the Ducati reed valve breather with a wash cloth zip tied around it so it didn't bang around. I also zip tied it to the carb. I never replaced the cloth and there was never any oil on the carb or the exhaust. The tube runs from the generator hole. I do think that blow by is a bigger problem at low speeds than high speeds. It could be that the peak power being at 6900 rpms makes a difference. I could not go below 4200 rpm due to EGR. It would idle, but there was no power. Slipped the clutch to 6000 to get off the line and was often first in the corner (unlikely to be first out of the corner!) David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Breather back into oil tank
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